Three Phase 33kv 34.5kv 35kv to 415v 400v 460v 100kVA Oil Immersed Transformer
1. Product Overview
The Three Phase 33kv 34.5kv 35kv to 415v 400v 460v 100kVA Oil Immersed Transformer is a high-performance medium-voltage distribution transformer designed for industrial, commercial, and municipal power grid voltage conversion scenarios. This 100kVA oil immersed power transformer supports multi high voltage input options including 33kV, 34.5kV and 35kV, and flexible low voltage output of 400V, 415V and 460V, perfectly matching the power supply standards of different regions and industrial equipment operating requirements. Adopting mature oil-immersed cooling technology and three-phase balanced voltage regulation design, this medium voltage step-down transformer features stable operation, strong load adaptability and long service life, which is a core power conversion device for medium-to-small capacity power distribution systems.
Manufactured in strict accordance with IEC, ANSI and national power industry standards, this 35kV class oil immersed transformer uses high-purity copper windings and high-quality insulating transformer oil, effectively reducing no-load loss and load loss. The product supports 50Hz/60Hz dual-frequency operation, meets the power demand of global industrial and civil power distribution projects, and solves the voltage mismatch problem between medium-voltage overhead lines and low-voltage electrical equipment efficiently. As a mainstream energy-saving distribution transformer, it has passed multiple safety and performance tests, with excellent insulation performance and overload resistance.
2. Core Product Specifications & Technical Parameters
This three-phase oil immersed step-down transformer adopts a two-winding isolation structure with standard rated capacity of 100kVA, covering universal voltage grade requirements for medium and low voltage power distribution. The standardized parameter design ensures compatibility with most power grid systems and industrial power supply equipment, realizing safe and efficient voltage conversion.
• Rated Capacity: 100kVA (stable continuous power supply, supporting 80kW effective power output under 0.8 power factor)
• Primary Input Voltage: 33kV / 34.5kV / 35kV (customizable non-excitation voltage regulation, ±2.5% or ±5% voltage adjustment range)
• Secondary Output Voltage: 400V / 415V / 460V three-phase AC (balanced three-phase voltage output, low voltage fluctuation)
• Working Frequency: 50Hz / 60Hz dual universal
• Connection Group: Dyn11 / Yyn0 (optional, effectively suppressing harmonic interference and ensuring voltage balance)
• Cooling Method: ONAN oil-immersed natural cooling (low noise, no forced heat dissipation equipment required)
• Winding Material: High-conductivity copper coil (low loss, high thermal stability, anti-aging)
• Insulation Level: Meet 35kV medium voltage insulation standard, strong lightning impulse resistance
• Efficiency: High energy-saving design, low no-load current, in line with international energy efficiency standards
3. Core Product Uses
The 33kV to 460V 100kVA oil immersed transformer is mainly used for medium-to-low voltage power conversion and power distribution transmission, serving as a key intermediate device in power supply systems. Its core function is to step down 33kV, 34.5kV, 35kV medium-voltage grid electricity to standard 400V, 415V, 460V low-voltage power, providing stable and compliant power supply for terminal electrical equipment.
As an essential industrial power transformer, it effectively solves the problem that medium-voltage power grids cannot directly supply power to low-voltage electrical appliances. It realizes voltage isolation, power distribution and voltage stabilization, avoids equipment damage caused by excessive input voltage, and improves the safety and stability of the entire power supply system. In addition, this energy-saving oil immersed distribution transformer can balance three-phase load current, reduce power transmission loss, and optimize the power consumption efficiency of industrial and commercial power systems.
4. Wide Application Scenarios
Thanks to its multi-voltage compatibility, compact structure and strong environmental adaptability, the 100kVA three-phase oil immersed transformer is widely used in various medium and small-scale power supply scenarios, covering industrial production, commercial operation, municipal engineering and new energy fields.
4.1 Industrial Production Sites
It is suitable for small and medium-sized factories, processing workshops, machinery manufacturing plants and light industrial production bases. The 35kV to 400V step-down transformer provides stable low-voltage power for production equipment, motor units, automated production lines and industrial control systems, ensuring continuous and safe operation of industrial production equipment.
4.2 Commercial & Civil Construction Projects
Widely applied in shopping malls, office buildings, residential communities, hotels and logistics parks. The 33kV to 415V oil immersed transformer undertakes the terminal power distribution work of building power supply systems, providing compliant power for lighting systems, air conditioning equipment, elevator equipment and daily civil electrical facilities.
4.3 Municipal & Infrastructure Engineering
It matches urban and rural power grid renovation projects, road traffic supporting power supply, park infrastructure power supply and water supply and drainage pump station power supply. As a standard municipal distribution transformer, it adapts to outdoor complex working environments and meets the long-term stable power demand of public infrastructure.
4.4 New Energy & Off-Grid Power Systems
Applicable for small photovoltaic power stations, wind power distributed power generation systems and energy storage power supply projects. The 34.5kV to 460V power transformer can convert the medium-voltage electric energy generated by new energy equipment into usable low-voltage power, realizing efficient grid connection and off-grid power supply of new energy systems.
4.5 Remote Area Power Supply Projects
It is the preferred power conversion equipment for rural power grid construction, mining area power supply and remote industrial park power supply. It can adapt to unstable medium-voltage line voltage in remote areas and output stable low-voltage power, solving the power supply difficulty of remote areas.
5. Outstanding Product Features
5.1 Multi-Voltage Compatibility & Strong Adaptability
This three-phase oil immersed distribution transformer supports three high-voltage input grades of 33kV, 34.5kV and 35kV and three low-voltage output specifications of 400V, 415V and 460V, covering mainstream voltage standards in Asia, Africa, Europe and America. The flexible voltage matching design enables it to adapt to different regional power grid standards and diverse equipment power demands, with extremely high project compatibility.
5.2 High Energy Saving & Low Loss Performance
Adopting high-quality silicon steel sheet core and high-conductivity copper winding technology, the 100kVA oil immersed transformer effectively reduces no-load loss, load loss and no-load current. Compared with traditional transformers, its power transmission efficiency is significantly improved, which can effectively reduce long-term operation power consumption and operation cost for users, meeting global energy-saving and emission reduction requirements.
5.3 Stable Operation & High Safety
The ONAN oil-immersed cooling structure realizes natural circulation heat dissipation, with low operating temperature and no overheating failure risk. The sealed oil tank design prevents insulating oil leakage and moisture infiltration, ensuring long-term stable insulation performance. Equipped with overvoltage, overcurrent and short-circuit protection functions, the medium voltage step-down transformer can automatically isolate faults in case of abnormal power supply, protecting terminal equipment and power grid safety.
5.4 Durable & Low Maintenance
The overall structure is sturdy and anti-corrosive, adapting to outdoor high temperature, low temperature, humid and dusty harsh environments. The high-quality insulating oil has strong oxidation resistance and long service cycle, avoiding frequent oil replacement and maintenance. The simple and reliable structural design reduces daily maintenance difficulty and later operation cost, with a service life of up to 30 years under normal operating conditions.
5.5 Low Noise & Environmental Protection
Optimized core lamination process and winding layout effectively reduce electromagnetic noise and mechanical vibration during operation. The whole machine operates with low noise, no electromagnetic pollution, and meets urban and industrial environmental protection standards. The sealed fully enclosed structure will not cause oil pollution, which is green and environmentally friendly.
6. FAQ (Frequently Asked Questions)
Q1: What scenarios are the 400V, 415V and 460V low-voltage outputs suitable for respectively?
The three low-voltage output specifications correspond to different regional power supply standards and equipment needs. 400V three-phase output is the most common, suitable for most domestic and Asian industrial and civil power distribution systems; 415V output matches the power supply standards of Southeast Asia, Australia and other regions, adapting to local industrial equipment and building power demand; 460V output is mainly used for American standard industrial equipment and special mechanical and electrical products, meeting the high-voltage low-power demand of imported industrial equipment. Users can select the corresponding output voltage according to project regional standards and terminal equipment parameters.
Q2: Can this 100kVA oil immersed transformer operate outdoors for a long time?
Yes, this 33kV/35kV class oil immersed transformer is specially designed for outdoor working conditions. It adopts integrally sealed anti-corrosion steel shell and rainproof, dustproof and moisture-proof structure, which can adapt to outdoor high temperature, low temperature, rainy and windy harsh environments. The insulating oil and internal components have strong environmental aging resistance, supporting long-term uninterrupted outdoor operation. It is widely used in outdoor power grid distribution, municipal infrastructure and remote field power supply scenarios without additional protective equipment.
Q3: What is the load capacity and overload tolerance of the 100kVA three-phase oil immersed transformer?
The rated stable load capacity of the transformer is 100kVA, which can continuously and stably drive about 80kW electrical load under 0.8 power factor. In terms of overload tolerance, it can withstand 1.2 times short-term overload operation for 2 hours and 1.5 times instantaneous overload for 30 minutes, which can effectively cope with instantaneous power surge of industrial equipment. It is not recommended to operate under long-term overload conditions, otherwise it will accelerate the aging of internal windings and insulating oil and affect the service life of the equipment.
